Filter



2 Sheets-Sheet 1. J. DAVIS. FILTER (No Model.)

No. 590,968, Patented Oct. 5,1897.

- Unitas STATES Farnwr (Enr ca,

Jon-N DAVIS, or ALLEGHENY, PENNSYLVANIA.

FILTER.

SPECIFICATION forming part of Letters Patent no; 590,968, dated Oetober5, 1897.

Application filed-Tannery 28, 1897., Serial No. 6 2l,0 86.- (No model.)

To all whom it may concern:

Be it known that 1, JOHN DAVIS, a citizen of the United States,-residingat Allegheny,

in the coun ty of Allegheny and State of Pennsylvania, have inventedcertain new and usewill enable others skilled in the art to which,

it appertains to make and use the same.-

My present invention relates to filtersof the class known as Pasteurfilters, and has for its object certain improvements in con-- struction,which will be fully disclosed in the following specification and claims.

In the accompanying drawings, which form part of this specification,Figure 1 represents a vertical section of myimproved filter; Fig. 2, atop plan View of the frame which supports the filtering-bodies; Fig. 3,alike view on the line 3 3, Fig. 1; Fig. t, an inverted plan ofthe'upper head of the frame; Fig, 5, a plan of the lower head of theframe; Fig. 0, a vertical section, on an enlarged scale, of the upperpart of the frame and the filteringbodies: and Fig. 7, a like view ofthe lower part of the same.

Reference being had to the drawingsand the letters thereon, Aindicatest-he body or casing of the filter; B, the detachable cover; 0,the supplypipe D, the discharge-pipe for filtered water, and E the pipefor discharging dirty water in cleansing the filter.

lVithin the casing is a frame composed of an upper cylindrical metallichead F, on the inner or under side of which are two annular andconcentric grooves or seats a b and a lower head G, on the inner orupper side of which are two annular and concentric seats 0 d directlyopposite the seats cab in the upper head, and. on the periphery of thehead G are lugs c e e 6, provided with vertical flanges ffff, by whichthe head is secured to the body or casing of the filter by suitablebolts. Between the lugs e e are openings 9 g g g, and through the headare openings h h h h for the passage of water from the annularprecipitating-chamber H to the chamber I through the openings g and fromthe sediment-chamber I to the chamber K through the openings h.

L indicates the outer annular filtering-bod y,

made of porous stone or composition; and M i the inner annularfiltering-body of the same material and concentric to the outer body.-The upper ends of the filtering-bodies engage the groovesor seats a b inthe upper head F of the frame, and the lower ends engage the materiahandbetween the two filtering-bod V ies is formed an annular storage-chamberN for clear water, which has been filtered by passing through the wallsof the two filteringbodies from the precipitatingchamber H through thewall of the body L and from the chamber K through'the wall of the bodyM.

To remove theimpurities which accumulate upon the periphery of thefilter-body L and the inner'surface of the casing, a revoluble brush Zis inserted in the chamber H, supported upon an arm m and revolvedby apinion 'n, which engages an idler 0, interposed betweenthe pinion n andthe annular fixed gear-wheel p, secured-to the upper side of the head F.The inner end of the arm m engages the shaft 0 and is revolved by thecrank 19'. The brush Z has an axial as well as an orbital motionimparted, and by having the two motions and by giving a reversed m 0-tion to the brush with the idler 0 much time is saved in cleaning.

To clean the inner surface of the wall of the body M, brushes (1 q areadjustably secured to the shaft 0 in the chamber K, and

to remove the sediment from the bottom of the sediment-chamber I a brushr is attached to the lower end of the shaft 0. Thus as the shaft 0 isrevolved by the crank 13 all the .brushes are put in motion and theseveral parts of the filter cleansed, the impure water flowing offthrough the pipe The chamber K is provided with a removable cover 8,through which the shaft 0 passes, and may be provided with verticalpassages for water to enter chamber K, and the cover B with astuffing-box t for the shaft 0.

Pindicates an air-pipe which extends to the upper end of theclean-water-storage chamber N and is provided with an automatically-opera'ted float-valve u to supply air to the filter. The air-pipeP also allows air to escape as the cleanrwater-storage chamber N isbeing filled, and when the clean-water chamber is nearly full of waterthe float-valve will close,and the air-above the water becomescompressed in the upper end of the chamber by the further vrise of thewater, so that if more clean water is wanted at any time than which theheavier impurities gravitate into the sediment-chamber I. relieved ofits heavier impurities passesinward through the Wall of thefilter-bodyL, into, the chamber N, and the water rising; from thechamber I through openingh in. the

head G fills chamber K and passes outward. through the wall of thefilter-body M int-o chamber N, from which the filtered water is.

discharged through pipe D.

Having thus fully described my invention, what I claim is 1.. A filterprovided with an outer casing, annular and concentric porousfilteri-ng-bodies, a. receiving and precipitating chamber bet-ween thecasing and theouter-filteringbody,a sedimentchaniber below thefilteringbodjies, an; annular clean-water-storage chamber between thefiltering-bodies, adischarge pipe at the lower end of thestorage-chamber,

achamber in the inner filtering-body and openings or passages connectingsaid chamher and the sediment-chamber, in combination with means forremoving impurities from thefiltering-bodies and from the bottom 0 thesediment-chamber.

2. A filter provided with annular concenheadscontaining annular grooveson their inner surfaces to receive said filtering-bodies, passagesaround and in the center of the lower head and lugs. for securing saidhead to. the casing, in. combination with. revoluble brushes. connectedto a central shaft and operating to remove impurities from the filter--v ing-bodiesand from the sediment-chamber. The water thus.

3. A filterprovided with annular and. con,-

-centric porous filtering-bodies, a storagechamberbetween the bodies, anair-supply pipe in said chamber extending to-the upper end thereof and.having anau to matically-operated float-valve, in combination with areceiving andprec-ipitating chamber and asediwent-chamber incommunication therewith.

In testimonywhereof I affix my signature in presence of two witnesses.

JOHN DAVIS.

Witnesses:

EDW. A. Hess, OLIVER R. MINNE EYER.

tric porous filtering-bodies,,a frame having

